メタデータ
| 項目 |
値 |
| Designation |
C/1998 Q1 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1998-06-29T12:12:45.789120Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:57Z |
| Obs used |
147 |
| NEO |
- |
| M1 |
14.000 |
| K1 |
10.000 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1998-09-07.0000000 |
| e |
0.99559540 |
| q (au) |
1.577877 |
| a (au) |
358.233578 |
| i (deg) |
32.305811 |
| Ω (om, deg) |
159.784650 |
| ω (w, deg) |
134.732300 |
| M (ma, deg) |
0.010101 |
等級
散乱 + 全体線形
$$
M_a = (16.841 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
16.841 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.819 |
| k |
0.987 |
| δ90 |
10.000 |
| パラメータ |
記号 |
範囲 |
説明 |
| 太陽・地球距離が1 AUのときの絶対等級 |
H0 |
-5 to 20 |
彗星の固有の明るさ |
| 測光スロープパラメータ |
n |
2 to 6 |
太陽距離に対する明るさ変化率 |
| 前方散乱非対称係数 |
gf |
0.8 to 1 |
前方散乱の強さ |
| 後方散乱非対称係数 |
gb |
-1 to -0.5 |
後方散乱の強さ |
| 分配係数 |
k |
0.8 to 1 |
前方/後方散乱の寄与比 |
| ダスト/ガス明るさ比 |
δ90 |
1 to 10 |
ダスト散乱とガス放射の相対寄与 |
参考: EPSC-DPS2025-160
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
06:34:48.24 |
-05:37:50.4 |
HIP 31339 |
19.61 |
| 2026-09-20 12:00 |
06:34:48.73 |
-05:38:07.3 |
HIP 31339 |
19.92 |
| 2026-09-21 00:00 |
06:34:49.21 |
-05:38:24.3 |
HIP 31339 |
20.23 |
| 2026-09-21 12:00 |
06:34:49.66 |
-05:38:41.4 |
HIP 31339 |
20.53 |
| 2026-09-22 00:00 |
06:34:50.10 |
-05:38:58.4 |
HIP 31339 |
20.83 |
| 2026-09-22 12:00 |
06:34:50.51 |
-05:39:15.4 |
HIP 31339 |
21.14 |
| 2026-09-23 00:00 |
06:34:50.91 |
-05:39:32.4 |
HIP 31339 |
21.44 |
| 2026-09-23 12:00 |
06:34:51.28 |
-05:39:49.5 |
HIP 31339 |
21.73 |
| 2026-09-24 00:00 |
06:34:51.63 |
-05:40:06.6 |
HIP 31339 |
22.03 |
| 2026-09-24 12:00 |
06:34:51.97 |
-05:40:23.6 |
HIP 31339 |
22.33 |
| 2026-09-25 00:00 |
06:34:52.28 |
-05:40:40.7 |
HIP 31339 |
22.62 |
| 2026-09-25 12:00 |
06:34:52.58 |
-05:40:57.8 |
HIP 31339 |
22.91 |
| 2026-09-26 00:00 |
06:34:52.85 |
-05:41:14.9 |
HIP 31339 |
23.20 |
| 2026-09-26 12:00 |
06:34:53.10 |
-05:41:31.9 |
HIP 31339 |
23.49 |
| 2026-09-27 00:00 |
06:34:53.33 |
-05:41:49.0 |
HIP 31339 |
23.77 |
| 2026-09-27 12:00 |
06:34:53.55 |
-05:42:06.1 |
HIP 31339 |
24.06 |
| 2026-09-28 00:00 |
06:34:53.74 |
-05:42:23.2 |
HIP 31339 |
24.34 |
| 2026-09-28 12:00 |
06:34:53.91 |
-05:42:40.3 |
HIP 31339 |
24.62 |
| 2026-09-29 00:00 |
06:34:54.06 |
-05:42:57.3 |
HIP 31339 |
24.90 |
| 2026-09-29 12:00 |
06:34:54.20 |
-05:43:14.4 |
HIP 31339 |
25.18 |
| 2026-09-30 00:00 |
06:34:54.31 |
-05:43:31.5 |
HIP 31339 |
25.45 |
| 2026-09-30 12:00 |
06:34:54.40 |
-05:43:48.5 |
HIP 31339 |
25.73 |
| 2026-10-01 00:00 |
06:34:54.47 |
-05:44:05.6 |
HIP 31339 |
26.00 |
| 2026-10-01 12:00 |
06:34:54.52 |
-05:44:22.6 |
HIP 31339 |
26.27 |
| 2026-10-02 00:00 |
06:34:54.55 |
-05:44:39.6 |
HIP 31339 |
26.54 |
| 2026-10-02 12:00 |
06:34:54.55 |
-05:44:56.6 |
HIP 31339 |
26.81 |
| 2026-10-03 00:00 |
06:34:54.54 |
-05:45:13.6 |
HIP 31339 |
27.08 |
| 2026-10-03 12:00 |
06:34:54.51 |
-05:45:30.6 |
HIP 31563 |
27.28 |
| 2026-10-04 00:00 |
06:34:54.46 |
-05:45:47.6 |
HIP 31563 |
27.12 |
| 2026-10-04 12:00 |
06:34:54.38 |
-05:46:04.5 |
HIP 31563 |
26.97 |
| 2026-10-05 00:00 |
06:34:54.29 |
-05:46:21.5 |
HIP 31563 |
26.83 |
| 2026-10-05 12:00 |
06:34:54.17 |
-05:46:38.4 |
HIP 31563 |
26.69 |
| 2026-10-06 00:00 |
06:34:54.04 |
-05:46:55.3 |
HIP 31563 |
26.56 |
| 2026-10-06 12:00 |
06:34:53.88 |
-05:47:12.1 |
HIP 31563 |
26.43 |
| 2026-10-07 00:00 |
06:34:53.70 |
-05:47:29.0 |
HIP 31563 |
26.32 |
| 2026-10-07 12:00 |
06:34:53.50 |
-05:47:45.8 |
HIP 31563 |
26.21 |
| 2026-10-08 00:00 |
06:34:53.29 |
-05:48:02.6 |
HIP 31563 |
26.10 |
| 2026-10-08 12:00 |
06:34:53.05 |
-05:48:19.3 |
HIP 31563 |
26.01 |
| 2026-10-09 00:00 |
06:34:52.79 |
-05:48:36.1 |
HIP 31563 |
25.92 |
| 2026-10-09 12:00 |
06:34:52.50 |
-05:48:52.8 |
HIP 31563 |
25.84 |
| 2026-10-10 00:00 |
06:34:52.20 |
-05:49:09.4 |
HIP 31563 |
25.77 |
| 2026-10-10 12:00 |
06:34:51.88 |
-05:49:26.1 |
HIP 31563 |
25.71 |
| 2026-10-11 00:00 |
06:34:51.54 |
-05:49:42.7 |
HIP 31563 |
25.65 |